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EXACT SOLUTIONS FOR BELOUSOV-ZHABOTINSKII REACTION-DIFFUSION SYSTEM

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Applied Mathematics(A Journal of Chinese Universities) 1996年第1期11卷 1-6页

作者： LI ZHIBIN SHI HE Department of Mathematics, lanzhou university, lanzhou 730000 Institute of Systems Science, Academia Sinica, Beijing 100080

We consider the following simplified model for the Belousov-Zhabotinskii(B-Z) reaction:?u/?t=u(1-u-rv)+d?~2u/?x^2,?v/?t=-suv+?~2v/?x^2,where r and s are positive parameters, and d is the diffusing constant for the concen-tration u. Seeking travelling wave front solution and making an ansatz for the solution,we obtain a nonlinear system of algebraic equations. The system is solved using WuElimination and then we are able to find several exact solutions which are of interest.

关键词： Iravelling wave solutions B-Z reaction Wu Eliminat1on,

Molecular modeling and spectroscopic studies on the binding of guaiacol to human immunoglobulin

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Science China Chemistry 2006年第6期49卷 550-559页

作者： HE Wenying1,2, YAO Xiaojun1, LIU Pengjun2, GAO Zhenxia2 & HU Zhide1 1. Department of Chemistry, lanzhou university, lanzhou 730000, China 2. Department of Chemistry, Hainan Normal university, Hainan 571158, China 1. Department of Chemistry Lanzhou University Lanzhou 730000 China 2. Department of Chemistry Hainan Normal University Hainan 571158 China

The fluorogenic property of guaiacol was exploited for the first time to analyze the interaction with target protein as a probe by molecular modeling, fluorescence, circular dichroism (CD) and Fourier transform infrared (FT-IR) spectroscopy. Molecular docking was performed to reveal the possible binding mode or mechanism and suggested that guaiacol can strongly bind to human immu- noglobulin (HIgG). It is considered that guaiacol binds to HIgG mainly by a hydrophobic interaction and there are two hydrogen bond interactions between the drug and the residues LEU 80 and ASP 65, which is in good agreement with the results from the experimental thermodynamic parameters (the enthalpy change △H0 and the entropy change △S0 were calculated to be 65.55 kJ·mol-1 and 132.95 J·mol-1·K-1 according to the Vant’ Hoff equation). Data obtained by the fluorescence spectroscopy indicated that binding of guaiacol with HIgG leads to dramatic enhancement in the fluorescence emission intensity along with significant occurrence of efficient Frster resonance energy transfer (FRET) from the residue of HIgG to the protein bound guaiacol. From the low value of fluorescence anisotropy (r = 0.06), it is argued that the probe molecule is located in the motionally unrestricted environment of the protein. The alterations of protein’s secondary structure in the presence of guaiacol in aqueous solution were quantitatively calculated by the evidences from FT-IR and CD spectroscopes.

关键词： guaiacol, human immunoglobulin, molecular modeling, fluorescence enhancement, Fourier transform infrared (FT-IR) spectroscopy, circular dichroism (CD).

MINIMUM FILL-IN PROBLEM OF GRAPHS

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Systems Science and Mathematical Sciences 1996年第3期9卷 193-197页

作者： YUAN Jinjiang (Department of Mathematics,Zhengzhou university, Zhengzhou 450052, China)ZHANG Heping (Department of Mathematics,lanzhou university, lanzhou 730000, China)

ＭＩＮＩＭＵＭＦＩＬＬ－ＩＮＰＲＯＢＬＥＭＯＦＧＲＡＰＨＳＹＵＡＮＪｉｎｊｉａｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＺｈｅｎｇｚｈｏｕＵｎｉｖｅｒｓｉｔｙ，Ｚｈｅｎｇｚｈｏｕ４５００５２，Ｃｈｉｎａ）... 详细信息

ＭＩＮＩＭＵＭＦＩＬＬ－ＩＮＰＲＯＢＬＥＭＯＦＧＲＡＰＨＳＹＵＡＮＪｉｎｊｉａｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＺｈｅｎｇｚｈｏｕＵｎｉｖｅｒｓｉｔｙ，Ｚｈｅｎｇｚｈｏｕ４５００５２，Ｃｈｉｎａ）ＺＨＡＮＧＨｅｐｉｎｇ（Ｄｅｐａｒ...

关键词： Graph fill-in fill-in number NP-complete

X-ray spectra induced by ^(129)Xe^(q+) impacting the metal surface

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Science China(Physics,Mechanics & Astronomy) 2008年第1期51卷 82-89页

作者： ZHANG XiaoAn 1,2 ,XIAO GuoQing 1 ,YANG ZhiHu 1 ,CHEN XiMeng 3 ,ZHAO YongTao 1 , LI FuLi 4 ,WANG Li 1,2 ,CUI Ying 3 ,ZHANG HongQiang 3 &ZHAN WenLong 1 1Institute of Modern Physics,Chinese Academy of Sciences,lanzhou 730000,China 2Department of Physics,Xianyang Normal university,Xianyang 712000,China 3Department of Modern Physics,lanzhou university,lanzhou 730000,China 4Department of Applied Physics,Xi’an Jiaotong university,Xi’an 710049,China 1. Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China 2. Department of Physics Xianyang Normal University Xianyang 712000 China 3. Department of Modern Physics Lanzhou University Lanzhou 730000 China 4. Department of Applied Physics Xi’an Jiaotong University Xi’an 710049 China

Using the slow highly charged ions 129 Xe q+ (q=25,26,27;initial kinetic T0≤4.65 keV/a.u.)to impact Au surface,the Au atomic Mαcharacteristic X-ray spectrum is *** result shows that as long as the charge state of projectile is high enough,the heavy atomic characteristic X-ray can be effectively excited even though the incident beam is very weak(nA magnitude),and the X-ray yield per ion is in the order of 10-8and increases with the kinetic energy and potential energy of *** measuring the Au Mα-X-ray spectra,Au atomic N-level lifetime is estimated at about 1.33×10-18s based on Heisenberg uncertainty relation.

关键词： slow highly charged ions characteristic X-ray level lifetime

A new ent-atis-16-ene type diterpenol from Euphorbia sieboldiana

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Chinese Journal of Chemistry 1991年第2期9卷 131-135页

作者： DING,Yi-Li JIA,Zhong-Jian WANG,Qi-Guang CHEN,Ji-Hong LIU,Yu-Ting Institute of Organic Chemistry,lanzhou university,lanzhou 730000 Department of Chemistry,Xingjiang university. Institute of Organic Chemistry Lanzhou University Lanzhou 730000

From the acetone extract of the root of Euphorbia sieboldiana,a new ent-atis-16-ene type diterpenol was isolated and its structure was demonstrated as ent-atis-16-ene-13 α-hydroxy-3,14-dione(1) based on the chemical ... 详细信息

关键词： A new ent-atis-16-ene type diterpenol from Euphorbia sieboldiana type

Computational stability of the forced dissipative nonlinear atmospheric equations

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Chinese Science Bulletin 1999年第10期44卷 949-952页

作者： LI Jianping and CHOU Jifan LASG , Institute of Atmospheric Physics , Chinese Academy of Sciences , Beijing 100080, China Department of Atmospheric Sciences , lanzhou university , lanzhou 730000, China Beijing Meteorological College, Beijing 100081, China LASG Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China Department of Atmospheric Sciences Lanzhou University Lanzhou China Beijing Meteorological College Beijing China

A new concept of computational quasi-stability (CQS) is introduced to study the computational stability (CS) of the forced dissipative nonlinear (FDN) evolution equations. Based on the concept, the CQS criterion of difference scheme of FDN atmospheric equations is obtained. So it provides the theoretical basis for designing the computational stable difference scheme of FDN atmospheric equations.

关键词： computational stability (CS) computational quasi-stability (CQS) operator equation difference scheme forced dissipative nonlinear (FDN) equations.

Synthesis of 5-[5-(α-Naphthyl)-2H-Tetrazol-2-Methylene]-2-Aroylamino-1, 3,4-Thiadiazoles

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Chemical Research in Chinese Universities 1992年第3期8卷 314-318页

作者： FENG Xiao-ming, CHEN Rong (Department of Chemistry, South-west Normal university, Chongqing)ZHANG Zi-yi (Department of Chemistry, lanzhou university, lanzhou)

Introduction Acylthiosemicarbazides have been reported to possess extensive physiological activities. Substituted thiadiazoles are known to exhibit fungicidal and insecticidal activities. Chen Limin and her coworkers reported that the cyclization of 1[5-(3’-pyridyl )-2H-tetrazol-2-acetyl-]-4-acylthiosemicarbazides gave 5-[5-(3’-

关键词： Synthesis Acylthiosenlicarbazide Physiological activity Fungicidai and insecticidal activities

Development of Expert Controller for Plasma Spraying Process

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材料热处理学报 2004年第5B期25卷 783-786页

作者： LIChun-xu CHENKe-xuan LIHe-qi LIDe-wu EducationMinistryKeyLab.ofAdvancedProcessingTechnologyforNon-ferrousMaterials LanzhouUniversityofScience＆TechnologyLanzhouChina CollegeofMaterialsScienceandEngineering LanzhouUniv.ofScience＆TechnologyLanzhouChina

Aiming at the plasma spraying process control, the control system model is developed on the basis of analyzing control parameters and coating properties and their correlation, and the corresponding control method and regulations are also given. With the developed expert controller for plasma spraying process, stable spraying can be realized using ordinary spraying powder and the coating of compaction, homogeneity and high bonding strength can be obtained.

关键词：等离子喷涂控制器粉末熔炼镀层厚度

Synthesis and spectral properties of arylmercury derivatives of α-thiopicolinanilide

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Chinese Journal of Chemistry 1993年第1期11卷 45-52页

作者： SONG,Mao-Ping WU,Yang-Jie Department of Chemistry,Zhengzhou university,Zhengzhou,Henan 450052YANG,Li CHEN,Ji-Hong National Laboratory of Applied Organic Chemistry,lanzhou university,lanzhou,Gansu 730000 1Department of Chemistry Zhengzhou University Zhengzhou Henan 4500522National Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou Gansu 730000

A series of thirteen arylmercury derivatives of α-thiopicolinanilide have been synthesized and characterized by elemental analysis,IR,~1H NMR and *** intramolecular coordination and the substituent effects on the MS and ^(199)Hg NMR behaviours have been *** has been shown that a linear correlation exists between the ^(199)Hg chemical shifts and the Hammett-Brown constants σ^+,and the electron-donating groups cause the chemical shift to move upfield.

关键词： Synthesis and spectral properties of arylmercury derivatives of OC thiopicolinanilide Hg